BattleFleet is the classic game of "Hit or Miss!", played for ages in schoolyards on gridpaper.
Two players each place 5 ships on a 10 x 10 grid. Neither player knows where the other's ships are. They each take turns trying to sink their opponent's ships.
If you miss, the game turns over to the other player. If you hit a ship, then you get to go again
until you miss.
The game is over when one player runs out of ammunition, or sinks all of the other player's ships.